嵌入式系统——基于Keil5的STM32固件库寄存器编程实现流水灯
作者:互联网
//PF9-LED0,PF10-LED1
//PF13-LED2,PF14-LED3
#define rRCCAHB1CLKEN *((volatile unsigned long *) 0x40023830)
#define rGPIOF_MODER *((volatile unsigned long *) 0x40021400)
#define rGPIOE_MODER *((volatile unsigned long *) 0x40021000)
#define rGPIOF_OTYPER *((volatile unsigned long *) 0x40021404)
#define rGPIOE_OTYPER *((volatile unsigned long *) 0x40021004)
#define rGPIOF_OSPEEDR *((volatile unsigned long *) 0x40021408)
#define rGPIOE_OSPEEDR *((volatile unsigned long *) 0x40021008)
#define rGPIOF_PUPDR *((volatile unsigned long *) 0x4002140C)
#define rGPIOE_PUPDR *((volatile unsigned long *) 0x4002100C)
#define rGPIOF_ODR *((volatile unsigned long *) 0x40021414)
#define rGPIOE_ODR *((volatile unsigned long *) 0x40021014)
#define time 0x300000
#define on 1
#define off 0
void led_init(){
//GPIOE -- rRCCAHB1CLKEN[4] GPIOF -- rRCCAHB1CLKEN[5]
rRCCAHB1CLKEN |= (1<<4)|(1<<5);
//MODER-OUT--01 PF9,PF10 [21:18]<------- 0101
unsigned long r_value;
r_value = rGPIOF_MODER;//read
r_value &= ~(0xf << 18);//clear
r_value |= (1 << 18)|(1 << 20);
rGPIOF_MODER = r_value;//write
//MODER-OUT--01 PF13,PF14 [29:26]<------- 0101
r_value = rGPIOE_MODER;//read
r_value &= ~(0xf << 26);//clear
r_value |= (1 << 26)|(1 << 28);
rGPIOE_MODER = r_value;//write
//OTYPER-PP--0 PF9,PF10 [10:9]<--------00
r_value = rGPIOF_OTYPER;//read
r_value &= ~(0x3 << 9);//clear
rGPIOF_OTYPER = r_value;//write
//OTYPER-PP--0 PF13,PF14 [14:13]<--------00
r_value = rGPIOE_OTYPER;//read
r_value &= ~(0x3 << 13);//clear
rGPIOE_OTYPER = r_value;//write
//OSPEEDR- PF9,PF10 [21:18]<-------1010
r_value = rGPIOF_OSPEEDR;//read
r_value &= ~(0xf << 18);//clear
r_value |= (1 << 19)|(1 << 21);
rGPIOF_OSPEEDR = r_value;//write
//OSPEEDR- PF13,PF14 [29:26]<-------1010
r_value = rGPIOE_OSPEEDR;//read
r_value &= ~(0xf << 26);//clear
r_value |= (1 << 27)|(1 << 29);
rGPIOE_OSPEEDR = r_value;//write
//PUPDR PF9,PF10 [21:18]<--------0000
r_value = rGPIOF_PUPDR;//read
r_value &= ~(0xf << 18);//clear
rGPIOF_PUPDR = r_value;//write
//PUPDR PF13,PF14 [29:26]<--------0000
r_value = rGPIOE_PUPDR;//read
r_value &= ~(0xf << 26);//clear
rGPIOE_PUPDR = r_value;//write
//ODR PF9,PF10 [10:9]<-------11
r_value = rGPIOF_ODR;//read
r_value |= (1<<9)|(1<<10);//clear
rGPIOF_ODR = r_value;//write
//ODR PF13,PF14 [14:13]<-------11
r_value = rGPIOE_ODR;//read
r_value |= (1<<13)|(1<<14);//clear
rGPIOE_ODR = r_value;//write
}
void led0_ctr(int is_on){
unsigned long r_value;
r_value = rGPIOF_ODR;
r_value |= (1<<9);//clear
if(is_on) r_value &= ~(1<<9);
rGPIOF_ODR = r_value;
}
void led1_ctr(int is_on){
unsigned long r_value;
r_value = rGPIOF_ODR;
r_value |= (1<<10);//clear
if(is_on) r_value &= ~(1<<10);
rGPIOF_ODR = r_value;
}
void led2_ctr(int is_on){
unsigned long r_value;
r_value = rGPIOE_ODR;
r_value |= (1<<13);//clear
if(is_on) r_value &= ~(1<<13);
rGPIOE_ODR = r_value;
}
void led3_ctr(int is_on){
unsigned long r_value;
r_value = rGPIOE_ODR;
r_value |= (1<<14);//clear
if(is_on) r_value &= ~(1<<14);
rGPIOE_ODR = r_value;
}
void ledAll_ctr1(int flag){
unsigned long r_value;
if(flag == 0){//LED0 off, LED1 off, LED2 off, LED3 off
led0_ctr(off);
led1_ctr(off);
led2_ctr(off);
led3_ctr(off);
}
if(flag == 1){//LED0 on, LED1 off, LED2 off, LED3 off
led0_ctr(on);
led1_ctr(off);
led2_ctr(off);
led3_ctr(off);
}
else if(flag == 2){//LED0 on, LED1 on, LED2 off, LED3 off
led0_ctr(on);
led1_ctr(on);
led2_ctr(off);
led3_ctr(off);
}
else if(flag == 3){//LED0 on, LED1 on, LED2 on, LED3 off
led0_ctr(on);
led1_ctr(on);
led2_ctr(on);
led3_ctr(off);
}
else if(flag == 4){//LED0 on, LED1 on, LED2 on, LED3 on
led0_ctr(on);
led1_ctr(on);
led2_ctr(on);
led3_ctr(on);
}
}
void delay(int v){
while(v--);
}
int main(){
led_init();
unsigned int flag = 0;
while(1){
for (int i=0;i<5;i++){
ledAll_ctr1(i);
delay(time);
}
for (int i=3;i>=0;i--){
ledAll_ctr1(i);
delay(time);
}
}
}
标签:unsigned,long,rGPIOF,STM32,volatile,rGPIOE,Keil5,固件,define 来源: https://www.cnblogs.com/wsl-lld/p/14791323.html